Is GDF6 p.Pro252= (c.756C>T) pathogenic?

GDF6 p.Pro252= (c.756C>T) is classified Likely benign in GDF6 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-04-16). Very rare (popmax 0.00251%, sas); Associated with microphthalmia, isolated, with coloboma 6.

What condition is associated with GDF6 p.Pro252= (c.756C>T)?

GDF6 p.Pro252= (c.756C>T) is associated with microphthalmia, isolated, with coloboma 6, Klippel-Feil syndrome 1, autosomal dominant, isolated microphthalmia 4 (ClinVar).

How common is GDF6 p.Pro252= (c.756C>T) in the general population?

GDF6 p.Pro252= (c.756C>T) is very rare (popmax 0.00251%, sas) (gnomAD).

GDF6 p.Pro252=

c.756C>T · rs759021639 · VCV1983258

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00251%, sas)

Conditions

microphthalmia, isolated, with coloboma 6

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.51	GERP 0.36, phastCons 0.014
Overall
CADD	7.781	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00251% South Asian · 2/79,792 alleles

Filtering AF 0.000416% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000156%

Overall 0.000133% 2/1,498,554 alleles · very rare exomes 2/1,346,316 · genomes 0/152,238 · joint denominator

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: GDF6
Protein: p.Pro252=
Coding: c.756C>T
MANE Select: NM_001001557
dbSNP: rs759021639
Type: single nucleotide variant
Location: chr8:96145175 (GRCh38)
Gene constraint: LOEUF 0.342 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 70.88
Residue 252: the 'disordered' region

Full GDF6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

microphthalmia, isolated, with coloboma 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Klippel-Feil syndrome 1, autosomal dominant isolated microphthalmia 4 Leber congenital amaurosis 17

Similar variants

GDF6 p.Pro252Arg Uncertain significance ★ ⚠ same residue
GDF6 c.*268G>C Uncertain significance ★★ same condition
GDF6 c.*273C>T Uncertain significance ★★ same condition
GDF6 c.*274T>C Uncertain significance ★★ same condition
GDF6 p.Ala199Thr Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala199Val Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala242Thr Uncertain significance ★★ ⚠ same condition
GDF6 p.Ala247Glu Uncertain significance ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/gdf6-p-pro252 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown